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1、网络结构基站总线 A high rate local packet bus(i.e.,IEEE-1394)that connects aURC to all channel cards.This bus carries traffic data and control(call setup,etc.)information.A lower rate serial bus,termed the peripheral(次要)bus(ANSI/ATA878.1,“ARCNET”),for control and OA&M communication withmany components(TXAMP
2、s,CBRs,TFU,TDUs)in the Modular Cell 4.0.And inventory and alarms from various components.Busmodcell1.0/2.0 A high rate local packet bus(i.e.,IEEE-1394)that connects aURC to all channel cards.This bus carries traffic data and control(call setup,etc.)information.A lower rate serial bus,termed the peri
3、pheral bus(ANSI/ATA878.1,“ARCNET”),for control and OA&M communication withmany components(UCRs,CTUs,TDUs)in the Modular Cell 4.0 The I2C bus which includes User and Frame Alarm information,inventory information,alarm status,amplifier inventory andalarms from various componentsBus-compact4.0/modcell3
4、.0User&Frame AlarmsRBXOTFU-1ActiveTFU-2Hot SpareGPSSmart Switch19.6 MHz(CCU,CRC)Even Sec 1 PPSCDMA Time of Day1:45 V5 V19.6 MHz(CCU,CRC)Even Sec（偶秒）1 PPSCDMA Time of Daymodcell时钟信号流程Smart Switch Connection2M通路FIT EFIT FIM EFIMCOMPACT4.0MODCELLCDBPCRCE1 T1电源通路modcell1.0电源通路modcell2.0电源通路modcell3.0电源通路modcell3.0电源通路compact4.0电源通路compact4.0电源通路compact4.0RF TX/RX通路